I would notice when Pixie was having growing spurts she would sleep more. Also when she had a vaccination she would sleep more. I would try not to worry as long as she is eating, drinking,Pooing, peeing, and has bouts of energy at sometime throughout the day. If you are really concerned you can call the vet it is always to be safe than sorry is my motto. I call my vet when I worry and they are very helpful.
__________________  Proud Mom of Daisy and Pixie  |